Robert f



(No Model.)

'J. MoADAMS.

HYDRAULIC ENGINE.

Patented Mar. 5, 1889.

WITNESSES: INVENT'DR WM? BY I ATTORNEY N PTYERS. Hmkruxhographzv. wumnmn. o, c.

UNITED STATES PATENT tlrricn.

JOHN MCA'DAMS, 0F NlilY YORK, ASSIGNOR OF ONE-HALF Ti) ROBERT F. ("-Ali'llYRlGll'l, OF KROOKLYN, NEXV YORK.

HYDRAULIC ENGlNE.

SPECIFICATION forming part of Letters Patent No. 899,204, dated March 5, 1889. Application filed June 12, 1888: Serial No. 276,885. 1N0 model in Hydraulic Engines, of which the following 1 is a speeilieatimi.

The invention relates to improvements in hydraulic engines for use in connection with passenger or freight elevators; and it consists in a novel arrz'ingement of valves and automat to mechanism for operating them, whereby the dischargcpipc l, in the customary mar.-

net with this class of engines.

The invention sought. to be pro teet ed h erehy pertains more particularly to the valve J in pipe G, with the means oi operating it, and the relief-valve l with its pipe Iii, which latter passes from the pipe G at a point between the. cylinder and valve 1 to the discharge pipe I.

The valve .1 is vertically acting, and its stem N passes through packing-boxes fl (2 at the elevatonearriage during the first port-ion of its travel, both on the ascent and descent, is caused to move gently and without jarring,

. ries on a transverse axle at its lower end the and more slowly than during the other parts of its travel, and whereby also, in case of breakage or other accident to the elevator;

hand-rope, a communication will be established between the end of the main cylinder of the engine and the discharge-pipe, and thus the elevator-carriage will be permitted to complete its travel and stop without danger of injury either to the passengers or to the engine.

The invention will be more fully understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, in which Figure 1 is a side elevation of an engine embodying my improvements. Fig. 2 is an enlarged vertical section on .the dotted line a l) of Fig. l, and Fig. 3 is an enlarged vertical longitudinal section through the pipe (with connections) which supplies the water to the cylinder.

In the drawings, A designates the main cylinder, which is of usual form and construe tion, and is furnished with the usual piston, sheaves, or drums, B, and cable C the operation of which is a matter of common knowledge, and need not be explained herein.

The wheel for the elevator hand-rope is lettered D, and this, according to thewell-known method, operates the usual valve in the box E to permit the water in the pipe F to enter the pipe G on the passage to the cylinder A, or to close oil": the supply-pipe F and permit the water from the cylinder to pass through the pipe G into the branch H, and thence into the upper and lower sides oi the pipe G, the

upper end of said stem terminating slightly below the horizontal arm of the bell-crank lever f, and the lower end of same. being in rigid connection with the arm 11, which carsmall wheel 1', fitting within the slot in. of the sliding cam-block u, as shown enlarged in Fig. 3. The block 1/. is coupled with the rod P, which extends along the engine and frame Q, as illustrated in Fig. 1, and is supported in and guided by the standards R. The camslot in, starting from its lowest point, I, has two equally-inclined surfaces, u.- 21;, diverging upward, one on each side of the said lowestpoint, and these two inclined surfaces meet, respectively, the horizontal surfaces u" .r', the surface to terminating at the left-hand end of the slot, and the surface .1.:' being continued by the upwardly-inclined surface yjleading to the highest point or surface, 2, of the camslot, as more clearly indicated in Fig.

The elevation and depression of the valve J toward and from its seat is effected by the cam-block n on its movement back and forth, bringing the different surfaces of the slot 7)! to act against the valve-stem through the wheel 1' and arm 71. The cam-block m is supported in guides T and receives its sliding movement from the rod P, which is actuated during the movement of the piston by the arm V, secured on the usual cross-head oi the piston-rod, coming into contact with the arms V \V, respectively, clamped on said rod P, or by coming into contact with the screws X. X, respectively, applied in the upper end of said arms \V W. On the latter end of the outward stroke of the main piston the arm V will be brought against the clamparm \V and move the rod P and cam-block a IOO sufficiently to carry the raised surface a; be-' heath the small wheel 5, the effect of which is to elevate the valve J, partially closing the same and slowing the movement of the ele= vator-carriage at the latter end of its travel by retarding the how of the water through the pipe G. Upon the return of the piston into the main cylinder the arm V will leave the clamp arm XV and permit the weight Y, through the equalizingiods Z, rocker A, and link B, to move the rod P and cam-block or back to its former or normal position, which is that shown in the drawings, the wheel 1' being at the lowest point, 2, of the cam-slot m and the valve J being fully opened, the effect being that the water will be enabled to flow 'freely through the pipe G to the dis charge, and the elevator-carriage may travel at full speed until the arm V comes into contact with the clamp-arm at the latter end of the inward stroke of the piston and moves the rod 1 sufficiently for the cam-surface w to comebelow and elevate the wheel i and valve-stem and partially close the valve J, when the flow of water through the pipe G will be retarded, as before, and the elevatorcarriage will move more slowly, thus com pleting-its descent gently and without jarring orgdiscomfort to the passengers. On the succeeding outward stroke of the main piston the elevator-carriage will ascend slowly until the arm V leaves the clam p-arm V, at which time the weight Y, acting through the equal: izing-rods Z, rocker A, and link B, draws-the red I? and cam-block n s-uflioiently to lower the wheel 1' to the lowest point, i, of the cam slot in and fully open the valve J, when the water will again move more rapidly through the pipe G, and the elevator-carriage may travel at full speed until, during the latter end of its ascent, the arm V again meets the clamp-arm lV,with the effects above described. The elevator-carriage on its ascent moves slowly for a short distance in starting, and then travels at full speed until near the top of the building, when it again slows up, and upon the descent of the carriage the same effects occur, the carriage starting down slowly, then moving at full speed, and finally slowing up when near the end of its movement.

The character of the cam-surfaces w w and the degree of movement they impart to the valve J will determine the degree of slowness the carriage is to have at each end of its travel, and the length of time the carriage is to move slowly maybe regulated at will by the position of the clamp-arms \V \V on the rod P or the adjustment of the screws X X in the upper end of said clamp-arms. The weight Y, with the equalizing-levers Z, rocker A, and link B, will, after each time that the rod P and cam-block n are moved inward by the arm V striking the arm \V, or outward by said arm V striking the arm \V, cause the said rod and cam-block to rcassume their normal position. \Vhcn the cam-block n is moved from its normal position, which is that shown,

it is accomplished byovercomin g the force ca ert-ed by the weight Y, and when the arm V ceases to act on the rod P the said weight at once returns the cam-block to its normal position.

If during the upward movement of the ele vatorcarriage the hand rope should accidentally break or other accident should occur which would render inoperative the main valve in the box E, the arm V at the latter end of the outward stroke would come into contact with the clamparm NV andfirst slow up the movement by drawing the elevated cam-surface a" under the wheel 1' in the lower end of the stem of the valve J, and then in the further continued motion of the main piston drawing the highest cam-surface, 2', beneath the said valve-stem, the effect being to close the valve J and through its stem and the bell-crank lever f to open the relief-valve L, located in the pipe M, whereby the water in the main cylinder may find an escape-to the discharge-pipe without danger of injury" to the engine. The elevator-carriage will then be stopped, notwithstanding the accident to the hand-rope. Another important function of the reliefvalve L is that it permits the immediate return of the pistonon' its inward stroke through cylinder A as soon as the hand-rope has been fixed. The highest surface, 2, of the cam-slot m is employed exclusively for operating the relief-valve L, and only comes into play in case of an accident which would prevent the main operatingvalve in the box E to be controlled. The valve J is not supposed to close perfectly tight, and hence the relief-valve L will dischargewhate vcr lcakagethere may be through the same and permit the piston in the main cylinder to remain at rest.

hat I claim as my invention, and desire to secure by Letters Patent, is

1. In a hydraulic engine, the oylinden-the supply-pipe G, leading to one end thereof, the valve J in said pipe, and the arm 72, connected with and extending downward from the stem of said valve and carrying the wheel 2', combin ed with the reciprocating block 01, mounted in horizontal guidesbelow said valve, the longitudinal slot mv in-said block inclosing said wheel and having the connected camsurfaces t, w, a, 10, and a and mechanism, substantially as described, for reciprocating the block 22 in its horizontal guides to partially close the valve J during a portion of each end of the travel of the piston, substantially as shown and described.

2. In a hydraulic engine, the cylinder, sup ply-pipe G, leading into one end of said cylinder, the vcrtical1y-acting valve J in said pipe,

and the arm 71, connected with the stem ofsaidvalve and carrying the wheel '2', combined with the reciprocating cam-block. 11, mounted in horizontal guides below said valve, the longitudinal slot min said block inclosing said wheel and having the con nected cam-surfaces I, u", a, w, and 0c, the reciprocating rod P,

rigidly connected with the cam-block, the arms W N on said rod, the traveling arm V, carried by the main piston, and mechanism, substantially as described, for returning the cam-block to its normal position after it has been actedon by the arm V, substantially as and for the purposes described.

The valve J in the supply-pipe G, and having a stem extending throngl'i the box inclosing said valve, combined with the sliding cam 11, having surfaces Z, w, :0, and z,mecl1- anism, substantially as described, for moving said cam against the stem of valve J during the operation of the engine, the bell-crank leverf, adapted to be actuated by the upper end of valve J, and the relief-valve 1; in a supplemental pipe, M, extending from the pipe G to the discharge-pipe, said valve L being arranged to open and close under the influence of the bell-crank lever f, substan' tially as set forth.

with the discharge-pipe I, the supplemental pipe M, having a Valve, L, and passing from a point in the pipe Gbetween the valve J and the end of the cylinder to the discharge-pipe, and mechanism, sul'istantially described, for actuating said valve, substantially as and for the purposes described.

5. In a hydraulic engine, the supply-pipe, having the valve J, combined with the cam 01, for operating said valve, the rod P, coupled with the cam n, arms \V W on said rod, traveling arm V, and the weight Y, equalizing-rods Z, rocker A, and link B, one end of the latter being connected with the said i rocker and the other end with the rod P, sub

stantially as and for the purposes set forth.

Signed at New York, in the county of New York and State of, New York, this 4th day of 4. In a hydraulic engine, the main cylinder A,

the supply-pipe G,leading into one end thereof, and the valve J in said pipe, combined June, A. D. 1888.

7 JOHN MCADAMS.

\Vitnesses:

' CHAS. C. GILL,

HERMAN GUsToW. 

